Lawn mower



June 15 1926. 1,589,279

E. O. WILSON LAWN MOWER Filed May l5, 1925 ATTORNEY.

Patented `lune 15, 1926.

UNITED STATES PATENT o-Frica.

EDWARD O. WILSON, OF MADISON, WISCONSIN.

LAWN MOWER.

Application filed May 15, 1925. 'Serial No. 30,507.

rlhis invention relates to lawn mowers and has for its primary object the provision, in the manner hereinafter set forth, of a lawn mower having the cutting blades thereof mounted forwardly of the traction wheels, in such a manner that grass may be mown in close proximity to a wall or fence., and further, the cutting knives are so mounted that the grass will be cut in front of the traction wheels of the machine thus preventing the wheels from meshing down unniown grass before the cutter p asses thereover.

cutting edge thereof in proper relation with respect to the cutting' blades of the mower.

A final object of the invention is the provision, in a manner `as hereinafter set forth,

of a lawn mower of improved construction,

light weight, durable, of easy manipulation, having few parts making it extremely easy to assemble and disassemble, and inexpensive to manufacture. A

rlhe invention will be best understood from the consideration of the following detailed description taken in connection with the accompanying drawing forming a part of this specification, with the understanding however, that the invention is not conformed to any strict conformityv with the showing of the drawing, but may be changed and modified so long as such changes and modifications mark no material departure from the salient features of the invention as expressed in the appended claim.

In the drawing:

Figure l is a side elevation of the mower embodying this invention.

Figure 2 is a bottom plan view of the same.

Figure 3 is a section taken upon theline 3-3 of Figure 2.

Figure e is a side elevation of the mower equipped with a chain drive instead of the gear train shown in Figure l.

Referring now to the draw'ng in detail wherein like numerals of reference indicate corresponding part-s throughout the several views, the device embodying this invention comprises a frame formed of apair of spaced members or plates land 2 respectively.

Y These plates l' andr 2 as shown,` each com-V prises a substantially circular forward portion 3 having a part of the 'edge'thereof cutv fiat as at t and further having projecting rearwardly therefrom at one end of said flat or straight portion l` a foot 5. Extending upwardly and rearwardly yfr-om the portion narrow arm 6.

The circular portions 3 of the plates each has a central aperture therethrough and the free end of each of the arms 6 also has an aperture therethrough.

Extending through the central apertures of t-he portions 3 and those in the arms G are shafts 7 andv 8' respectively, and upon the shaft` 8, upon the inner side of each of 3 of each of the plates is a .relatively the arms 6 there-is mounted a traction wheel ing manner against the edges 4 of the plates.V

lThe cutter bar ll has each end thereof upon the upper surface formed in an arcuate shape as at 12, and further has a pair of spaced vertical slots 13 formed through each end. The arcuate portion 3 of each of the plates, has formed therein, in the edge 4, a pair of threaded bores 14; into which adjusting screw 15, extending through the slots 13, are threadet` The heads 16 of the adjusting screws bear against the under side of the bar 4l and as they are drawn up, if one is tightened more than the other, the bar 11 will be rocied longitudinally to lift or depress the sharpened edge 17 of the bar to properly position the same beneath the cutting blades 10.

Each of the feet 5 extending from the portions 3 of the plates have apertures therethrough to receive securing bolts 18 which extend therethrough and into the end of a roller member 19 positioned between the feet 5. This roller member is to support the cutter blades'and bar the proper distance above the ground is well known in lawn mower construction.

Securing` or tie rods 2() extend between the plates 1 and 2 and receive on the ends thereof bolts 21, after having passed through the plate.

The shafts 'f' and S, each extend a little distance beyond the plate 1 as shown and the shaft 8 carries a large 2jr r .vheel thereon which meshes with an idler gear 23 supported upon the stub shaft 2li which is ".iounted upon the outer side of the plate 1 in alignment with and between the shafts 7 and 8, and this gear 23 in turn mesher` with a pinion which is keyed to the ef;- tended end of the shaft 'i'. Yower transmitted to the shaft 8 and the gear 22 through the revolution of the traction wheels 9 causes the knives 10 to revolve across the cutter bar 11 to perform the cutting function.

At the forward end of each of 'the straight portions 1- of the plate there is rotatably mounted upon the bolts 29 an auxiliary supporting` wheel 30. rlhese bolts as shown extend through the plate nd supper-t the wheels 3() at the inner side of the plate. As will be readily apparent these wheels act to prevent the machine from being tipped forwardly to bring the forward 'ing edges of the plate 3 against the ground thus )reventingsr the cutting` knives 10 from digging into turf.

Pivotally mounted as at 2G upon the outer side of each arm 6 is an upwardly and inwardly directed arm 27, the ends of which are in spaced relation upon the longitudinal center of the machines, to receive therebetween the end of an operating,` handle 28.

ln Figure l there is shown a slight modification of the struct-ure disclosed in the othcr figures, in this construe ion the idler gear 23 is done away with and there is passed over tne large gear 22 and the pinion 25 the sprocket chain 29 so that po is transmitted directly from the la jre gear to the pinion and the knives without the intervention of the extra gear 23.

Having; thus described my invention what ll claim is:

A lawn mower of the character described, coinprisiirf;` a pair of spaced substantially circular side plates each having a portion of its lor ed je formed straight, an extension con-sti ating; a foot at the rear of said straight portions, a rearwardly and upwardly enten/dine arm carried by each plat-e, a sha ft ccf ric-"ting the enos of said arms, trartion ne on said shaft, a roller estendinv between said foot portions, a shaft congctnijy; between said plates, cnt-ter elements c. "ied on the last mentioned shaft to revolve therewith, means for taking power from .said traction wheels to said cutter shaft to revolve the saine, a cutter bar havends adjustably secured to the strain it portionsof said pi :es forwart ly and above the lower edge of ald footl extensions, and an auxiliary supperting` wheel mounted upon each plate at the forward end of the straight portion thereof, and forwardly of said cutter bar.

in 'testimony whereof, l aina nr signature hereto.

itc:

EDV/TARD 0. XVLSON.

Certificate of Correction.

It is hereby certified that the residence of' applicant in Letters Patent No. 1,589,279, granted J une l5, 1926, upon the application of Edward O. 'Vilson, for an improvement in Lawn MoWers,7 was erroneously described and specified as Madison, Wisconsin, Whereas said residence should have been described and specified as Madison, N ebmsca, as shown by the application records in this office; and that the said Letters Patent should be read with this correction therein that the saine may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 3d day of August, A. D. 1926.

[SEAL] M. J. MOORE,

Acting Commissioner of Patents. 

